THE GRIM ADVENTURES OF BILLY AND MANDY

Play as Boogey:Successfully complete Mission 9 in Tier 4 in Mission mode.
Play as Chicken:Successfully complete Story mode as all characters and accumulate 10 hours of game play.
Play as Dracula:Successfully complete Mission 5 in Tier 3 in Mission mode.
Play as Eris:Successfully complete Story mode as Billy, Mandy, Grim, or Irwin.
Play as Fred Fredburger:Successfully complete Story mode as Billy, Mandy, Grim, or Irwin
Play as General Skarr:Successfully complete Mission 6 in Tier 4 in Mission mode.
Play as Hoss Delgado:Successfully complete Mission 9 in Tier 1 in Mission mode.eihd.
Play as Jack O'Lantern:Successfully complete Mission 9 in Tier 2 in Mission mode.
Play as Lord Pain:Successfully complete Mission 9 in Tier 5 in Mission mode.
Play as Mogar:Successfully complete Story mode as Billy, Mandy, Grim, or Irwin.
Play as Nergal Jr.:Successfully complete Mission 9 in Tier 3 in Mission mode.
Play as Nergal:Successfully complete Story mode as Billy, Mandy, Grim, or Irwin.
Play as Nerglings:Successfully complete Story mode as all characters.
Play as Pumpkin:Successfully complete Story mode and deal out a total of 100,000 damage points.
Play as Vikings:Successfully complete Story mode as all characters and destroy every letter in the credits sequence.
Alternate costumes:Successfully complete Story mode with any character to unlock an alternate costume for that person. When you complete Story mode with a character that has a costume and you destroy the credits, Mandy will be in a costume.